Mechanized Waste Sorting Segmentation and Density Separation

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Solution Overview

Problem

Current recycling systems face inefficiencies in recovering recyclable materials from mixed solid waste, leading to low recovery rates and high energy consumption, due to labor-intensive processes and contamination issues, which results in significant environmental and economic challenges.

Innovation Solution

The method involves sizing and density separation to create intermediate waste streams enriched in recyclable materials, followed by mechanized sorting using equipment like optical sorters and eddy current sorters, ensuring efficient extraction of recyclables from unsorted mixed waste streams, including those with high mis-compliance rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If recycling systems process mixed solid waste without pre-sorting, then they can handle unsorted waste streams, but the recovery rates of recyclable materials are low and contamination is high

Engineering Contradiction:

Improveability to handle unsorted wasteVSAvoidrecovery rate of recyclables

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system segments the waste stream into multiple sorted fractions using automated sorting equipment. Optical sorters, eddy current sorters, and other mechanized devices divide the mixed waste into separate streams based on material composition, enabling high recovery rates without requiring manual pre-sorting by consumers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces manual sorting (mechanical human labor) with automated mechanized sorting systems. Optical sensors, eddy current separators, and other automated devices perform the sorting function that previously required human workers, dramatically improving recovery rates while handling unsorted waste streams.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If recycling systems use manual sorting processes, then they can identify and separate recyclable materials, but the processes are highly labor intensive and costly to operate

Engineering Contradiction:

Improverecovery rate of recyclablesVSAvoidlabor intensity and operational cost

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The sorting system performs automated identification and separation of recyclable materials without human intervention. The mechanized equipment self-regulates the sorting process, eliminating the need for labor-intensive manual sorting while maintaining high recovery rates and reducing operational costs.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent substitutes human labor with automated mechanical and optical systems. Eddy current sorters, optical detectors, and conveyor systems work together to automatically identify, sort, and separate recyclable materials, replacing the need for manual sorting operations and reducing both labor intensity and operational complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If recycling processes consume large amounts of energy for sorting and processing, then they can achieve high recovery rates, but the energy balance becomes sub-par or negative

Engineering Contradiction:

Improverecovery rate of recyclablesVSAvoidenergy consumption of recycling process

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The system applies sorting and processing only to the extent necessary to achieve high recovery rates. By using automated detection and sorting, the process avoids excessive energy consumption associated with manual handling and re-processing, achieving an optimal energy balance that maintains positive energy efficiency while maximizing recyclable material recovery.

Inventive Principle:

Principle #16Partial or excessive action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach significantly increases the recovery rates of recyclable materials, such as metals, plastics, and paper, from mixed waste streams, reducing contamination and energy consumption, and making recycling more economically viable.

Implementation Method 1

fractionating the shredded waste stream by size and density to produce a plurality of intermediate waste streams

Methodology Applied

Scientific EffectDensity separation: Density Gradient

Implementation Method 2

individually sorting the plurality of intermediate waste streams and recovering at least two recyclable materials

Methodology Applied

Scientific EffectOptical detection: Absorption Spectroscopy

Implementation Method 3

The systems and methods can use sizing and density separation to produce intermediate waste streams that can be properly sorted to extract large percentages of valuable recyclable materials

Methodology Applied

Scientific EffectEddy current: Eddy Currents

Data Source

PatentEP2643101B1Mechanized separation of mixed solid waste and recovery of recyclable products

Publication Date: 2022.07.13 ORGANIC ENERGY CORP

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AI summary

The method and systems efficiently extract recyclable materials from a mixed solid waste stream. The methods and systems use sizing, density and dimensional separation to produce intermediate waste streams that are enriched in particular recyclable materials. The recyclable materials can then be efficiently sorted from the individual intermediate streams using mechanized sorting equipment.